We hear Laura Metcalf  say [ma·kʼ], then [ma·kʼ].  Her first pronunciation is an excellent example of a light pronunciation of an ejective k [kʼ].  Her second pronunciation is a passable example of a light pronunciation of an ejective k [kʼ].  Light pronunciations of ejective consonants are common in languages which have ejectives as phonemes, as Milluk has.  

Visual Evidence of Ejective Consonants:

In a sound file of this interview segment using Audacity sound file editing software, there is a clear visual indication that Laura Metcalf’ first pronunciation of the word here ends with an ejective.  Audacity sound files have a detailed wave-form picture, much more detailed than on this website.  The visual indication is in the form of a distinct blip, which appears to be after the word.  That is the ejective release of the consonant.  If you select just the blip and listen to it, you can hear an ejective k [kʼ].  For her second pronunciation of the word here, the blip is less clearly an ejective release, either to see it, or listen to it.  

[k] and [q]:

Annie Miner Peterson’s [qʼ] in her pronunciation of the word [ma·qʼ] ‘neck’, is farther back in the throat than [kʼ].  In the interview segment Neck 2, we can hear Laura Metcalf say both [ma·kʼ] and [ma·qʼ], representing a range of pronunciations for this consonant in this word.  That range exists in the language as a whole, going beyond Laura Metcalf’s own South Slough Milluk.